I love Raphael " the wolverine " of the Tmnt. My favorite version would have to be Josh Pais from Teenage Mutant Ninja Turtles (1990). When I was a kid, I was kinda suprised to find out that Josh was a white dude, because his Raph always reminded me of Ice Cube for some reason.

Rob Paulsen Ralph from the Fred Wolf toon was my second favorite because he was such a wise ass. The 4Kids Ralph is my third favorite.